An assembly of mains electricity (AC-powered) devices designed for the transcutaneous application of heat to a localized body site (e.g., joint, limb) to relieve musculoskeletal pain. It consists of an electric heating pad typically made of synthetic fabric materials, and a hand-held control unit used to regulate and monitor the heat. It is normally available [non-prescription] over-the-counter (OTC) for use in the home.